Fly-screen



(No Model.)

' C. T. SIEBERT.

Y V FLY SCREEN.

No. 599,641. Patented Feb. '22, 1898.-

I .UNITED STATES PATENT OFFICE.

cABL T. SIEBERT, OF PITTSBURG, PENNSYLVANIA.-

FLY-SCREEN.

SPECIFICATION formingpart of Letters Patent no.59e,e41, dated February 22, 1898.

Application filed March 8,1897- flerial No. 626,355. (No model.)

To all whom it may concern:

Be it known that I, CARL T. SIEBERT, of Pittsburg, in the county of Allegheny and State of Pennsylvaniafliave invented a new perspective view showing the construction of the piece forming the slot for passage of the flies; and Fig. 6 is a view of the sheet-metal blank from which the fly-passage trough is made, the lines on which the blank is bent being indicated by dotted lines.

The object of my invention is to provide a fly-screen. so constructed as to exclude the entrance of flies, while permitting them to pass out from the room freelyQ The device which I have invented is very simple. It is cheap and easily applied and may be cut to any size for the purpose of fitting it in window-frames.

The screen proper (marked 2 in the drawings) is made of woven wire, and it is formed at intervals with transverse slots or openings 3, at the sides .of which there are strengthening-wires 3. The screen is also preferably provided with series of vertical strengthen ing-wires 4. The fly-passage troughs are inserted in the slots 3 and are made as shown in Figs. 5 and 6. Each is preferably stamped in a single piece out of sheet metal, and consists of an inclined plate portion 5, having at devices '11.

As above stated, this device may be in an integral piece stamped from a single flat sheet In applying the fly-screen to use it is cut to i the size of the window-sash or door to which it is to be applied. The fly-passage troughs are also out to the desired width and are inserted in the slots 3, the flanges 6 and the lips 11 fitting against the wire fabric of the screen, so as to hold the trough in place, and the slot 10 and plate 5 extending to the outside of the screen. When the parts are thus arranged, flies on the inside of the screen when walking up the same will naturally follow the slot 10 at the top; but flies on the outside will not pass down through the slot, for they will not pass down through a narrow slot where they have no foothold along the vertical side of the slot. The device is therefore eflective in excluding flies from the room and ridding the room of flies which are already there. screen maybe made,and sold,in the same manner in which ordinary fly-screens are made. It may be made in any desired width and cut to size when it is fitted to the sash.

The form of the device maybe modified with- The in the scope of my invention as defined in the and plate having flanges or lips for securing the trough to a fly-screen. 3. A fiy-pa'ssage trough comprising an upwardly and outwardly extending plate connected at the top with a strip aflording an infording an intermediate slot, said plate and strip having flanges or lips for securing the trough to the screen.

6. A fly-screen having a transverse slot in the fabric,said fabric havin gvertical stren gthening-wires extending across said slot, and a trough having flanges or lips by which it is secured in said slot.

In testimony whereof I have hereunto set my hand.

CARL T. SIEBERT.

Witnesses:

THOMAS W. BAKEWELL, G. I. HOLDSHIP. 

